@article{01570663,
title = {A characterization of M\"obius transformations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {23},
year = {2000},
pages = {663-666},
doi = {10.1155/S0161171200010255},
zbl = {0973.30011},
language = {en},
url = {http://dml.mathdoc.fr/item/01570663}
}
Niamsup, Piyapong. A characterization of Möbius transformations.. International Journal of Mathematics and Mathematical Sciences, Tome 23 (2000) pp. 663-666. doi : 10.1155/S0161171200010255. http://gdmltest.u-ga.fr/item/01570663/